kernel: add missing symbol to kmod-kvm

Even though TRACEPOINTS is not enabled in my kernel config, my build
fails due to KVM_MMU_AUDIT being missing. Add this symbol to kmod-kvm to
fix this.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

package/kernel/linux/modules/virt.mk

@@ -21,6 +21,7 @@ define KernelPackage/kvm-x86
   DEPENDS:=@TARGET_x86_generic||TARGET_x86_64 +kmod-irqbypass
   KCONFIG:=\
 	  CONFIG_KVM \
+	  CONFIG_KVM_MMU_AUDIT=n \
 	  CONFIG_VIRTUALIZATION=y
   FILES:= $(LINUX_DIR)/arch/$(LINUX_KARCH)/kvm/kvm.ko
   AUTOLOAD:=$(call AutoProbe,kvm.ko)